Appliance for operating punches or the like.



PATBNTED DEG. 22.11903.

No. 747,521. I

T. A. WEST-0N. APPLIANCE FOR OPERATING PUNGHES OR THE LIKE.

APPLIUATION FILED JUNE 17, 1898.

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No. 747,521. PATENTED DEC. 22, 1903.

T. A. WEST-0N.

APPLIANCE FOR OPERATING PUNGHES OR THE LIKE.

APPLICATION FILED JUILH 17,1398. H0 MODEL 2 SHEETSSHEET 2.

, WITNESSES: INVENTOR Lfa/a/ 1Q! THOMR6 FLWESTON M5 7 ATTORNEYS m:NoamsyErERs co, PNOYO-LITHO.. wAsmNcTcN. n. c,

UNITED STATES I Patented December 22, 1903.

PATENT OFFICE.

TIIOMAS A. WESTON, OF ARDEN, NORTH CAROLINA.-

SPECIFICATION forming part of Letters Iatent No. 747,521, dated December22, 1903. Application filed June 17,1898. Serial No. 683,743. (Nomodel.)

To all whom it may concern.-

Be it known that I, THOMAS A. WESTON, a citizen of the United States ofAmerica, residing in Arden, county of Buncombe, State of North Carolina,have invented an Improved Appliance for Operating Punches or the Like,of which the following is a specification.

The object of my said invention is to provide an inexpensive movement orappliance of few parts, great power, and varied adaptability,

\ for the purposes of punching, cutting, shearing, swaging, pressing,embossing, grasping, cutting, and for other allied uses of which it maybe capable.

To illustrate my said invention, the accom panying drawings show itembodied in a simple type of hand-punch, Figure 1 being a longitudinalelevation, and Fig. 2 a plan; Fig. 3, an end elevation; Fig. 4, avertical section in the line 4 4., Fig. 1; and Fig. 5, a side view ofthe cam and roller. Fig. 6 is a view illustrating a modification, andFig. 7 is a view of another modification.

Referring to Figs. 1 to 5, A and B are two levers of the third orderthatis, each lever is constructed to have the power applied between itsfulcrum and the load. The two levers have their fulcra near to eachother and preferably coincident by being mounted upon a common pivot a.As a matter of preference in construction each lever is bifurcated, theforks being solidly united at the free or acting ends A B of the lever,which carry the coacting, punching, cutting, or other tools. The saidlevers are constructed to-overlap each other transversely. The lever B,which in the present instance may be referred to as the lower one, hasupwardlyextending cheeks B B which overlap and guide (and in this caseembrace) the downwardly-extending cheeks A A of the lever A. The cheeksA A are united to each other by the stay A firmly fixed or rivetedtherein. The cheeks B E are united to each other by the stay B whichpasses free and clear through slots A A in the lever A to allow thelatter its motion upon its fulcrum. From the overlapping form of thelevers and the position therein of the stays A B the forcing apart ofthe said stays brings together or toward each other the acting ends ofthe levers A B along with the tools there carried. Also by the saidoverlapping construction of the levers I am onabled to place compactlywithin their transverse dimensions or width the device or means wherebythe said levers can be forced together or apart at their acting endscarrying the tools or dies, thereby making a strong, compact,symmetrical, and self-contained appliance, movement, or device. A

While I do not wish to limit myself to particular devices for operatingthe levers,.I employ, preferably, a cam O, which may be convenientlymounted to turn upon the stay B and may act upon a roller A which may bemounted to turn on the stay A The cam 0 may have sockets 0 (four ormore) to receive the hand-lever D, whereby the cam may be rotated.

In the drawings I have shown a punch E in the lever end A and acorresponding die fixed in the lever end B.

G G are set-pins, the inner hardened ends of which in contact with theouter ends of the stay A form adjustablelateral guides to the lever A.

Any suitable means may be employed for separating the acting ends of thelovers after action. For instance, as shown in Figs. 1, 4., and 5, astud or pin H may be fixed in the cheek A with its inner hardened endentering a cam-groove G in the cam O, by which stud'and groove the leverA and the roller A are lifted back to their upper normal position (shownin the figures) and are at all times kept in proper relative position tothe cam 0. In large machines the stud H may be duplicated-that is,another one fixed upon the opposite cheek A with a corresponding grooveto (J upon the adjacent side of the cam O. The said studs may beprovided with rollers, if desired, to diminish wear.

In place of the die and punch E F the acting ends A B may be providedwith shearblades, embossing-dies, swaging, riveting, or other tools, orwith crushing or grasping faces and respectively being capableofoperation by my invention.

The action is as follows: The substance to be cut, swaged, pressed,grasped, or punched is placed upon the anvil-die F. The upper tool E isthen brought down upon it by rotating the cam C in the direction of thearrow,

Fig. 5. The further rotation of the cam 0 causes the tool E to descendupon or enter the die F and in its descent to indent, cut, or crush thematerial between the tools E F. The said downward movement of the tool Eis due to the eccentric rim of the cam C depressing the roller A, withthe lever A carrying it. In Fig. 5 the cam is shown with its shortestradius in contact with the roller A Its longestradius is at O and whenthis is in contact with the opposite vertical radius of the roller A thelever A will be at the lower extreme of the stroke. By continuing therotation of the cam in the direction of the arrow, Fig. 5, the groove 0acting upon the stud H, lifts upward thereby the lever A, restoring itand all the parts to the normal positions shown in Figs. 1, 3, 4, and 5.

When less than the entire down ward stroke of the upper tool E isrequired, the latter may be lowered to any convenient point by turningthe cam O, and from that point downward and back again an up-and-downmotion can be given to the tool E by a correspond ing up-and-down motionof the leverD in the manner of a bench-shears or cutting-nippers. Forall of these and other kindred uses my invention is designed as a basicmechanical movement. It is also obvious that the roller A may be pivotedeccentrically, as shown by Fig. 7, or have its periphery cam-shaped thatis, of varying radiusso that by pressing its periphery at differentportions to the cam C (say the long radius G or the short one, H) thenormal distance of the cam-axis B from the axis of the roller or cam Amay be varied, thus effecting a varied normal opening between the toolsE F.

It is obvious that the stays A B could be forced from each other andtogether and operated by toggle-links uniting them, in effect radii,respectively, of the cam O and roller A in order to close and open theacting lever ends A B for the purposes set forth, as represented in Fig.6. B C are the toggle-levers, and K is an operating-rod with rack isgearing into a pinion P, through which the power may be applied.

I claim as my invention 1. The herein-descri bed appliance com prisingtwo levers of the third order having corresponding parts overlappingeach other, in combination with operating means to cause the ends of theoverlapping parts to diverge to make the free ends of the leversapproach each other, substantially as set forth.

2. The herein-described appliance, comprising two levers of the thirdorder having overlapping parts and having coacting dies or other toolsat their free ends, in combination with operating means to cause theends of the overlapping parts to diverge to make .the free ends of thelevers approach each roller carried by the two levers within the widththereof, substantially as set forth.

5. The herein-described appliance comprising two levers of the thirdorder having coacting dies or other tools at their free ends and havingoverlapping parts, in combination with an operating-cam within the widthof said levers and an operating-lever for said cam, whereby the ends ofthe overlapping parts are diverged to close the free ends of the leversand converged to open them, substantially as set forth.

6. The herein-described appliance, com-- prising two levers of the thirdorder having parts embracing and guiding each other in combination withan operating means contained within the said embracing parts,substantially as set forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

THOMAS A. WESTON.

Witnesses:

A. K. ALEXANDER, HUBERT HOWSON.

